Análise do ciclo biológico do Aedes aegypti (Diptera: Culicidae) exposto a cenários de mudanças climáticas previstas pelo IPCC (Intergovernmental Panel on Climate Change)
The Aedes aegypti is considered the main vector of dengue virus, urban yellow fever and Chikungunya fever. Insects are susceptible to changes in environmental factors such as rainfall and temperature. Responsible for regulating population size and aspects of mosquito biology, such as larval growt...
| Autor principal: | Azevedo, Juliana Bruning |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12485 http://lattes.cnpq.br/1579394722201053 |
| Resumo: |
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The Aedes aegypti is considered the main vector of dengue virus, urban yellow fever
and Chikungunya fever. Insects are susceptible to changes in environmental factors such
as rainfall and temperature. Responsible for regulating population size and aspects of
mosquito biology, such as larval growth, development time, body size, longevity,
fertility and blood supply. The Intergovernmental Panel on Climate Change (IPCC)
predicts an increase of 2° to 4° C in average global temperature over the next century.
These climatic changes may result in significant changes in landscapes and ecological
patterns of infectious diseases, and interfere directly in the development and behavior of
A. aegypti. This study evaluated different aspects of vector biology as amount amount of
ingested blood, fertility, egg laying and hatching of eggs and longevity, climate change
scenarios, planned for the year 2100, intermediate and extreme scenarios. Among the
predicted variables to undergo changes due to climate change, the temperature is
primarily responsible for changing the biology and vector behavior. Concentrations of
CO2, even three times the current concentration does not significantly affect the results
obtained in this study. The amount of blood ingested by females raised in higher
temperature was higher compared to females who lived at lower temperatures, longevity
is low at temperatures above 32° C, living approximately 40 days and no longevity
difference between sex. The fertility is greatly affected by temperature, being reduced
by half in higher temperatures. The oviposition is impaired in temperatures above 32°
C, but this effect was not observed in the outbreak. Mathematical models project an
increase in the number of dengue cases and geographic expansion in vector distribution.
However, our data indicate that, in future scenarios of climate change, some aspects of
the biology of A. aegypti will be affected. With the above information, it was possible to
better understand the biology of the vector and taking also into account climate change,
serving as a basis for other studies. |